Optimize ascii(str): don't encode/decode repr if repr is already ASCII
diff --git a/Objects/object.c b/Objects/object.c
index fd1fd25..79f1c8a 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -451,6 +451,9 @@
if (repr == NULL)
return NULL;
+ if (PyUnicode_IS_ASCII(repr))
+ return repr;
+
/* repr is guaranteed to be a PyUnicode object by PyObject_Repr */
ascii = _PyUnicode_AsASCIIString(repr, "backslashreplace");
Py_DECREF(repr);
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 99628ca..0996afb 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -6499,7 +6499,7 @@
return NULL;
/* Fast path: if it is an ASCII-only string, construct bytes object
directly. Else defer to above function to raise the exception. */
- if (PyUnicode_MAX_CHAR_VALUE(unicode) < 128)
+ if (PyUnicode_IS_ASCII(unicode))
return PyBytes_FromStringAndSize(PyUnicode_DATA(unicode),
PyUnicode_GET_LENGTH(unicode));
return unicode_encode_ucs1(unicode, errors, 128);